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Effects of Laplace Pressure on Propagation and Termination in Aqueous Heterogeneous Free Radical Polymerization

✍ Scribed by Per B. Zetterlund; Masayoshi Okubo

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
123 KB
Volume
15
Category
Article
ISSN
1022-1344

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✦ Synopsis

Abstract

Summary: The influence of the Laplace pressure in polymer emulsion particles during aqueous heterogeneous free radical polymerization on the polymerization kinetics has been investigated. Calculations were carried out based on experimentally reported pressure dependences of propagation and termination rate coefficients. The results suggest that in most cases the effects are not likely to be significant, although under conditions of very small particles (diameter <20 nm) and high interfacial tensions effects of the order of a few percent on propagation (increase in rate) and termination (decrease in rate) were predicted.

(k~p~/k~t~^0.5^)/(k~p~/k~t~^0.5^)~0~ as a function of particle radius as a result of the Laplace pressure.

magnified image(k~p~/k~t~^0.5^)/(k~p~/k~t~^0.5^)~0~ as a function of particle radius as a result of the Laplace pressure.

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